Coughing while sleeping is often due to the effect of phlegm discharge, because if the lungs want to discharge phlegm, it is very difficult to do so during the day when sitting or standing as it is a movement from the bottom to the top. When lying down in bed, the journey of phlegm discharge becomes horizontal, and it is easier to discharge phlegm in this horizontal state, so when you lie down and cough, you are generally talking about the problem of phlegm discharge. In this case, we should pay attention to the dinner time to eat must not eat too heavy, because if the phlegm is discharged at once, it will not make you cough so much that you can not sleep. However, if the phlegm is sticky and not easy to get out, you will cough continuously, and then you will not be able to sleep at all, which directly affects your rest. This situation should be in the diet, especially dinner as light as possible, do not eat spicy and fresh or sweet and sour, bitter and salty taste too heavy, and after dinner also try not to eat like plums, strange beans, drink coffee, eat chocolate, which are hot or more stimulating. Do not eat these things can help phlegm better out, you can also prepare some phlegm medicine, to cough if you drink a sip of phlegm medicine, so that phlegm quickly out, you can also go to sleep earlier.